Machine for bending flanged metal bars



(N0 Model.)

A. J. MOXHAM. MACHINE FOR BENDING PLANGED METAL BARS.

. No. 530,196. Patented Dec. 4, 1894.

PklgTNEiSiS: INVENTOH We/L Arr RNEY.

THE NORRIS PETERS 0a.. Prio voLm-qofl WASHINGTON 0. c4

UNITED STATES PATENT retest ARTHUR Jr. MOXHA'M, F JOHNSTOWN,PENNSYLVANIA.

MACHINE FOR BENDING FLANGED METAL BARS.

SPECIFICATION forming part of Letters Fatent No. 530,196, dated.December 4, 1894.

Application filed March 23, 1894. Serial No. 504,893. (No model.)

i To all whom it may-concern.-

' ing at Johnstown, county of Gambria, State of Pennsylvania, haveinvented a new and useful Improvement in Machines for Bending FlangedMetal Bars, of which the following specification is a true and exactdescription, due reference being had to the accompanying drawings.

My invention specially relates to a machine for bending that class ofbeams known as channel-beams, and which are composed of a web memberhaving on each edge a flange angularly disposed to the web.

The object of my invention is to provide a machine adapted to effect ashort, sharp bend in a channel, as hereinafter set forth.

In bending channels it is sometimes desirable to bend them by foldingtogether a portion of theflanges While bending the web,-and it is toefiect abend of this character that my machine is adapted.

Referring tothe drawings: Figurel is an end view of a channel of thetype described. Fig.

.2 is a side View of the same, the dotted lines showing it after beingbent.

Fig. 3 is a perspective view of a channel after being bent in mymachine. The fold in the flange shows clearly in this view. Fig. 4 is atop view of the lower die of my machine. Fig. 5 is a front and Fig. 6, aside view of the machine.

A is a die or. former, the top of which is beveled off at the properangle to form the desired angle in the channel, and which is formed tofit inside the channel when bent.

B is a mating die adapted to fit outside the channel when bent, andoperated by any suitable power attached to rod O, the channel being thuspressed into shape between the two dies. Themovable die B is guided byany suitable guides, as the rods 0 on which slide the lugs D. In eachside of the lower die is a pocket E, the use of which will behereinafter explained. V Oppositethese pockets are the fingers F sopivoted at G in block H that they may enter the pockets E and benormally held away therefrom by the springs L. These blocks H aremounted in suitable guides so that they may be slid downward therein.This would compress the spring I which acts to restore the block to itsnormal position.

In the top die B are inclined slots K which engage the fingers F, and,as the dies come together, these inclines force the fingers in- Wardinto pockets E.

The operation of the machine is as follows: The channel being heated andplaced in the machine, as shown, the top die descends and the edges M Mstriking it coin mence to bend it over the apex of the die A. At thesame time the inclines K. engage the fingers F and force theminward'against the flanges of the channel (see Fig. 5), and, as the diedescends, the fingers continue to force the flanges into the pockets E,thus making the fold shown in Fig. 3. As the fingers, though made asthin as possible, are in the folds of the flange the sides of the foldcannot come close together. Hence it becomesnecessary to withdraw thefingers. To do this I provide on the fingers the lugs N which engage thetop die before it is fully down, and, as it descends farther, they areforced down against springs I and withdrawn from the fold in the flange.As they are withdrawn from the fold before the die is fully down andwhile the channel is still not fully bent, the final bend in the channelcloses the two sides of the fold together and thus forms the neat andcompact bend show-n in Fig. 3.

The connection 0 may be joined to any suitable power, and the die 13 maybe caused to travel in any path which will effect the bending; forinstance, it may be connected with a piston rod reciprocating in astraight line, or it may be attached to an arm pivoted at the other endand so engage the bar with a swinging action. It might be desired alsoto have both dies movable which could be readily done by connecting bothdirectly with suitable power.

The method of performing such bending as herein described, I havedescribed and claimed in an application filed by me March 23, 189A, andbearing Serial No. 504=,892.

Having thus fully described my invention, what Iclaim, and desire toprotect by Letters Patent, is g 1. A machine for bending flanged metalbars, consisting of a pair of dies between which the bar is bent,operating mechanism connected therewith and finger bars pivotallymounted'in one die and operated by the other die, in such manner thatthey are adapted to engage the flanges of the bar and bend them in themanner set forth.

2. In a machine for bending flanged metal bars, in combination with apair of dies between which the bar is bent, and operating mechanismtherefor; finger bars adapted to engage and bend or fold, as described,flanges of the bar, said finger bars being so mounted that they may bewithdrawn from the fold for the purpose set forth.

3. In a machine for bending flanged metal bars, in combination with apair of dies between whieh the bar is bent, and operating mechanismconnected therewith; pockets in one die adapted to receive flanges ofthe bar when bent; finger bars adapted to bend or fold said flanges intosaid pockets; and blocks in which the finger bars are pivoted, saidblocks being so mounted on one of the dies that the finger bars may beWithdrawn from the folds in the flanges before the bar is fully bent.

4. In a machine forbending flanged metal bars, in combination with apair of dies between Which the bar is bent, and operating mechanism;pocketsin onedieand finger bars normally out of said pockets, the fingerbars being so connected and arranged that they are adapted to haveamovement inward into said pockets and downward in said pockets.

In testimony whereof I have affixed my signature in presence of twoWitnesses.

ARTHUR J. MOXI IAM.

Witnesses:

WM. A. DONALDSON, D. BRYAN.

